Valve.



PATBNTED SEPT. 24, 1907. B. B. MEAGHAM.

VALVE. APPLIGATION FILED Nov.7.19o5.

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wi Meana Specification of Letters Patent.

VALVE.

Patented Sept. 24, 1907.

Applicatiuu filed November 7, 1905. Serial No. 286,256.

To all whom it may rentrera:

Be it known that i, .BENJAMIN l. AlicAtznAM, a cit i'/.en

` el' the United States, residing at Lorain, in the county o Lorain and State ot' Ohio, hare invented ne\\ and useful 11n}'irovement,s in Valves, ol' which the ltillowing 'is a specilcat ion.

This invention relates to valves designed especially for controlling ihe supply ol' waterand gas to a water heater, and has i'or its objects to productie a comp-.1ra-

tively simplehinexpensive device of this character in' which the supply of liquid und luid will be positively' and automatically controlled, one wherein, alter initially setting the parts oi the valve, its further adjustment is rendered unnecessary,` thus obviating liability oi the mechanism becomingdisarranged1 and one wherein the valve casing may be conveniently drained when not in use-i With these and other objects in view, the invention I comprises the novel features ol' construction and tonubination ol parts more l'ully hereinafter described.

1n the accompanying drawings: Figure iis a longitudinal section centrally through ja valve embodying the invention. Fig. 2 is a ross section taken ou the line 2*2 of Fig. l.

Referring to the drawings, l designates a valve easing having an upper water chamber 2 and a lower gas chamber 3 separated from the clnunber 2 by a. wall or partior ports ilund with water inlet openings or ports @l2 vpreferably ol triangular forni` as shown.

Provided on the casing l at the outer 0r lower end of gas chamber 3 and for etimnun'iication with the latter is an inlet port l?, leading l'rom a gifs supply main il and an outlet port. l5 leading to a service pipe or duct lt through whith gas is supplied to the burner oi a heater,

. not showin-.1nd to which healer the duct. it) `supplies the water to be heated, there being l'ormed in the easing between the ports .I3 and 'l5 a web or partition l7 having an opening or passage lle adapted to beelosed by a valve .I9 threaded on the lower end ol' a tubular valve stem 2() movable lthrough the openingv and fixed at its upper end in a rigid pressure-operated member er piston 2l iuovablv arranged in the chamber 2 and normally closing the water inlet openings or ports 12 in the tubular guide t). on whieh. the piston slides.

lhreaded on the stem 20 at a. point between its lends to move therewith is a second rigid pressuieoperated inen'iber or piston 22 movable in the chamber 3 be- 55 tween the passages 5 and 18. lhe piston 22 is provided with au annular opstanding flange 23 to which is at-A tached one end ot a tubular coupling or sleeve 24 eeniposed ol' rubber or other ilexible impervious material and having its upper end attached to an annular ilange 25 on the under side ol' the division wall 4. Arranged on the stem 20 and disposed between the wall 4 and piston 22 is a compression spring 2G that tends to hold the valve i9 closed. The stein 2() has a bore 28 that opens into the space above the piston 22 through an aperture 27 and the lower end oi' the bore is closed by a screw plug 2S) whieh is removable.through an opening'l in the bottom oi the valve casing 1, which opening is normally closed by a plug 30. By taking out the plugs 30 and 2t), the water can be drained iroin the valve casing, pipe i0 and water heater supplied by the pipe, it',of course, being nec lsary to first cut oi'i the supply of. water from the servit-e pipe 7.

ln practice, when the water is eut oli by closing thev4 valve at the heater, the parts oi the valve mechanism are iu the position illustrated in Fig. l. When the-water valve ol' the heater is opened, the pressure of the water in the pipe i() and in the spaee above the piston 2i is decreased and the Water at city pressure operates on the under side ol' the piston 2l with a greater power than it does on the piston-22 and overcomes thetlatter and its spring 2G sothat the pistons andvalve stem move upwardly to open the gas valve 19 so that the supply oi gas,is automatically opened. By the upward movement oi' the piston 2l, the ports 12 are uncovered to open the supply oi water to the heater through the supply pipe 110. when the valve in the pipe 10 is' closed. ythe pressure on both sides of the piston 2l be eomesequalzed' through the ports 11v and the pressure oi the` water acting on the lower piston 22 combined with the effect of the spring 2G causes the pistons to move downwardly and close the gas supply valve 19.

l'iaving thus i'ully described my invention, what I claim as new is: i

In a device 0I the class described, fa casing' having a water chamber provided with u water inlet port and u gas rhamher provided with inlet and outlet ports, a main partiton arranged in the casini,r between said chambers and having;l an openingl forming a passage of communication between said chambers; a partition arranged in the gas ehainher between the inlet and outlet `ports and provided with an opening forming a passage ofheomumuicatou between said ports, a cover applied to the casing for closing one end of the water chamber and having a tubular guide vmember projected into the latter, said guide member' being closed at its inner end and vprovided between its ends with relief openings and with water inlet passages, aiservice pipe connected with the outer end 0f the tubular guide; a.

l rigid pressure operated piston slidably mounted on the iubular guide within the wnler chamber and adapted tn normally close the water passages in said guide, i1 yulve siem attached to said piston and arranged for movement through the opening in the main partition, u valve fixed on said stem and adapted to close. the passage of' uom-y municaton between lne gas inlet and outlet ports. n second rigid piston fixed on and for movement with the stem, said second piston being arrangedvin the gas chamber at a l0 point between the-openings` inthe partitions, n flexible, inipervious tubular coupling member `4ngnged x11: its ends re spectlvely with the muin partition and second pinion und .fi bxihlfuce spring.r :1l-ranged on the sleni between the umin puriifiou and second pistou.

In testimony vhereof, I '.iix my signature in prescrire of two witnesses.

BENJAMIN E. MNACIIAM.

' Witnesses:

(im. L. Gm'rscn,

W. B, TnoMi'soN. 

